Knife sharpener



June 24, 1930. R. E. MILLSAP 1,767,091

KNIFE SHARPENER.

Filed March '7, 1929 ATTORN EY Patented June 24, 1930 OFFICE ROBERT E.MILLSAP, F JERSEY CITY, NEW JERSEY KNIFE SI-IAIIEQIPEITER Applicationfiled March 7, 1929. Serial No. 345,020.

This invention relates to a knife sharpener.

The object of the'invent-ion is the production of a sharpener by meansof which blades of various thicknesses, depths and lengths can be easilysharpened. The second object of the invention is the production of asharpener, by means of which the cutting portion thereof is sharpenedduring the operation of drawing it through the sharpener. The thirdobject of the invention is the production of. a sharpener by means ofwhich sharpening wheels are maintained in contact with the cuttingportion of a blade as it is being operated'upon.

' The fourth object of the invention is the production of a knifesharpener comprising automatically operated sharpening means.

In the accompanying drawings Fig. 1

represents in part a front elevation and section as on the line 1, 1 ofFlg. 4 of an exemplification of the improved knife sharp-v ener; Fig. 2shows a partial side view and section of Fig. 1 on the line 2, 2; Fig. 3

is abottom plan view of the knife sharpener; Fig.4 indicates a top planview and section of Fig. 1 on the line 4, 4; Fig. 5 represents a sectionof Fig. 1 on the line 5, 5 on an enlarged scale and Fig. 6 shows anenlarged view of a fragmentary portion of Fig. 1.

The knife sharpener in this instance comprises the U-shaped base 20'having the upper wall 21, with the dovetail guide slot having theinclined side walls 22 and the horizontal wall 23. Longitudinal openings25 are formed in the wall 23.'

Similar adjustable U-shaped standards are each indicated with the topwall 31, the

place.

pair of the journal lugs 40 is journaled a vertical spindle 44, towhich-is fastened an adjusting roller 45. To the upper end of each ofthespindles 44 is fastened a bevel gear 46. In the upper portion of eachpair of walls 33 and 34 is journaled a horizontal spindle 47, which hasfastened thereto the bevel gear 48 which is in mesh with the bevel gear46. A collar 49 is fastened to the spindle 47 to laterally maintain itin tened to the s A' sprocket chain wheel 54 is faspindle 47. In eachofthe pair of guide slots 39 is slidably supported a U-shapedbrackethavin'g the pair of longitudinal legs 55 with the connecting leg56. In each pair of the legs 55 is journaled the horizontal spindle 57-that has fastened thereto the collar 58 and the sprocket chain wheel 59.T

he sprocket chain Wheels 54 and 59 are connected by the sprocketchain60. To each of the spindles 57 is fastened the sharpening Wheel 61. Thesharpening wheels 61 ar enormally located with their circumferentialfaces in. contact. From each. connecting leg 56 of each 'U-shapedbracket extends a guide pin 65, and from each rear wall 32 extends aguide sleeve 66 axially in line with its coacting guide pin 65. A

spring'67 encircles eaoh'pin and sleeve :66, and bears between the leg56 and the rear wall 32.

To use "the between the sharpener a blade is inserted adjusting rollers45 withits cutting portion 'in contact .with the adjacent portionsoftthe circumferential faces of the sharpe this means ro ni ng wheels61. The blade is then drawn forwardly and backwardly. By

tation is transmitted. from'ithe adjusting rollers. 45 to the sharpeningd tend the pair of journal lugs 40. In each timethe springs 67 force thesharpening wheels 61 toward the cutting portion of said blade.

wheels 61, by means of the bevelgears 46, 48,, thesprocketchain wheels54, 59 and the sprocket chains 60. While the'bladeis lo hug the bladeoperated upon. At the same Various modifications may be made in theinvention and the present exemplification is to be taken as illustrativeand not limitative thereof.

Having described my invention what I desire to secure by Letters Patentand claim is:

1. In a knife sharpener the combination of a pair of adjustablestandards, a base slidably supporting said standards, a sharpening wheeladjustably journaled in each standard, an adjusting roller pivoted to.each standard adjacent to its sharpening wheel and means to transmitrotation from each adjusting roller to the sharpening wheel of itsstandard. v

2. In a knife sharpener the combination of a pair of adjustblestandards, means to slidably support said standards, a spindle journaledin each standard, a roller fastened to each of said spindles, a secondspindle adjustably journaled in each standard, a sharpening wheelfastened to each second spindle and transmission means interposedbetween the spindles of each standard.

3. In a knife sharpener the combination of a pair of adjustablestandards, means to slidably support said standards, a spindle journaledin each standard, a roller fastened to each of said spindles, a secondspindle journaled in each standard, a sharpening wheel fastened to eachsecond spindle, a third spindle journaled in each standard, a gearfastened to each third spindle, a gear fastened to each of the spindlesof the rollers, the said gears in mesh with each other, a sprocket chainwheel fastened to each third spindle, a sprocket chain wheel fastened tothe spindle of each sharpening wheel and a sprocketchain connecting thesprocket chain whee1s.

4. In a knife sharpener thecombination of a pair of adjustablestandards, a base 'slidably supporting said standards, a pin extendingfrom each standard through an opening 1n the base, a spring connectingsaid pins, an adjusting roller journaledin each standard, a sharpeningwheel journaled in each standard, said adjusting roll ers adapted tohave a knife blade inserted between them and maintained in contacttherewith, said rollers turning when said blade is drawn between themand means to c transmit rotation from the rollers to said sharpeningwheels.

5. In a knife sharpener the combination of a'pair of adjustablestandards, means to slidably support said standards, an adjusting rollerjournaled in each standard, a

bracket slidably supported in each standard,

a spring bearing between each bracket and its standard, a sharpenlngwheel ournaled in each bracket and means to transmit rotation from eachadjusting roller to the sharpening wheel in itsstandard. I

6. In a knife sharpener the combination of a pair of adjustablestandards, a base slidably supporting said standards, a spring coactingwith said standards to draw them toward each other, an adjusting rollerjournaled in each standard adapted to bear against a blade locatedbetween them, a sharpening wheel journaled in each standard, a springcoacting with each sharpening wheel to force them toward each other andmeans to transmit rotation from each adjusting roller to the sharpeningwheel of its standard. 7

7. In a knife-sharpener the combination of a pair of adjustablestandards, a dovetail projection extending from each standard, a basehaving a dovetail guide slot, said projections engaging said slot,flexible Signed at the Borough of Manhattan, city of New York, in thecounty of NeW'York andState of New York this 4th day of March, A. D.1929.

' v ROBERT E. MILLSAP.

